• 文献标题:   Edge states in graphene quantum dots: Fractional quantum Hall effect analogies and differences at zero magnetic field
  • 文献类型:   Article
  • 作  者:   ROMANOVSKY I, YANNOULEAS C, LANDMAN U
  • 作者关键词:   electron spin polarisation, graphene, localised state, quantum hall effect, semiconductor quantum dot, strongly correlated electron system, total energy, wave function
  • 出版物名称:   PHYSICAL REVIEW B
  • ISSN:   2469-9950 EI 2469-9969
  • 通讯作者地址:   Georgia Inst Technol
  • 被引频次:   17
  • DOI:   10.1103/PhysRevB.79.075311
  • 出版年:   2009

▎ 摘  要

We investigate the way that the degenerate manifold of midgap edge states in quasicircular graphene quantum dots with zigzag boundaries supports, under free-magnetic-field conditions, strongly correlated many-body behavior analogous to the fractional quantum Hall effect (FQHE), familiar from the case of semiconductor heterostructures in high-magnetic fields. Systematic exact-diagonalization (EXD) numerical studies are presented for 5 ]